Discussions By Condition: I cannot get a diagnosis.

cafe OH LAY!

so i'm in my late teens and i've been wondering what these cafe au lait spots have been called for years! i noticed the first one when i was about 8 or 9, over the years the number has only increased and its over the whole left side of my lower back. i've done some google searches and i'm a little disturbed to discover that some serious skin diseases could come with this. i want to see a doctor about it but i'm really worried. does anyone know if these are just harmless????